| 摘要 |
An equalizer circuit for use in a communication unit comprises a variable amplitude equalizer (VAE) and a variable group delay equalizer (VDE). The variable amplitude equalizer (VAE) is able to vary only an amplitude frequency response continuously without varying a group delay frequency response, while the variable group delay equalizer (VDE) is able to vary only a group delay frequency response continuously without varying an amplitude frequency response, both being able to adjust the amplitude and group delay frequency responses, respectively, in an independent manner. Preferably, the variable group delay equalizer (VDE) includes an amplitude correcting portion and is structured such that amplitude distortion caused in a delay portion can be corrected by a signal from the amplitude correcting portion.
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